Here's a quick video showing showing how this hydraulic tilt trailer operates. To use the hydraulic function power has to be connected to the hydraulic pump. Once that's done there is a controller with an up-and-down switch. Push the button you desire to use whether that's to tilt the trailer back or lower the deck. When going to offload a container you'll tilt the trailer deck up almost as far as it can go so the the back side of the trailer is almost touching the ground. Once that's done you're ready to pull out from underneath it. After you have pulled out from underneath it give yourself a couple of feet between the trailer and container soyou can then lower the deck back down without the trailer hitting the container.
enjoy
